One making toast, professional model (8)
I believe the answer is:
proposer
'one making toast' is the definition.
(I've seen this before)
'professional model' is the wordplay.
'professional' becomes 'pro' (synonyms).
'model' becomes 'poser' (synonyms).
'pro'+'poser'='PROPOSER'
(Other definitions for proposer that I've seen before include "One introducing motion" , "Nominator" , "One putting forward motion" , "Advocate" , "he asks for a hand" .)